JP2002145678A - Coal-ash-containing porous block and its production process - Google Patents

Coal-ash-containing porous block and its production process

Info

Publication number
JP2002145678A
JP2002145678A JP2000334443A JP2000334443A JP2002145678A JP 2002145678 A JP2002145678 A JP 2002145678A JP 2000334443 A JP2000334443 A JP 2000334443A JP 2000334443 A JP2000334443 A JP 2000334443A JP 2002145678 A JP2002145678 A JP 2002145678A
Authority
JP
Japan
Prior art keywords
granulated
coal ash
cement
wet
granulated material
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2000334443A
Other languages
Japanese (ja)
Inventor
Takeshi Sugiyama
武 杉山
Kenji Ando
兼治 安藤
Yoshimitsu So
芳充 蘇
Fumihito Ozeki
文仁 尾関
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chubu Electric Power Co Inc
Mino Ceramic Co Ltd
Original Assignee
Chubu Electric Power Co Inc
Mino Ceramic Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Chubu Electric Power Co Inc, Mino Ceramic Co Ltd filed Critical Chubu Electric Power Co Inc
Priority to JP2000334443A priority Critical patent/JP2002145678A/en
Publication of JP2002145678A publication Critical patent/JP2002145678A/en
Pending legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B40/00Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
    • C04B40/0028Aspects relating to the mixing step of the mortar preparation
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/91Use of waste materials as fillers for mortars or concrete

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a coal-ash-containing porous block which consists of granulated material lumps each comprising coal ash and cement, and pores among the granulated material lumps, wherein the formation process of the granulated material lumps comprises adding water to a granulated material formed by subjecting a homogeneous powdery raw material mixture of coal ash and cement to wet granulation, to form a granulated material in a wet state, and causing a weak plastic flow of the wet granulated material to bind the constituent granules of the granulated material to each other. SOLUTION: Since a procedure, that comprises charging a granulated material formed with coal ash as the main raw material, as it is, into a form to subject the granulated material to vibration forming, is adopted in this production process, the process has such practical advantages that the objective porous block consisting of coal ash, and cement can simply be produced at a low cost and the utilization range of coal ash can be extended. Further, in the production process, since the granulated lumps each comprising coal ash and cement are formed by causing a weak plastic flow of the wet granulated material charged into the form and almost uniformly binding the constituent granules of the granulated material to each other, strength of the resulting porous block can be improved.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【産業上の利用分野】本発明は、石炭灰質多孔質フ゛ロック
と、この石炭灰質多孔質フ゛ロックの製造方法に関し、詳しく
は、石炭火力発電所から排出される石炭灰の高い利用率
と、低コストが図れる多孔質フ゛ロック(透水性インターロッキンク゛フ゛ロッ
ク、植生フ゛ロック、環境フ゛ロック、擁壁フ゛ロック、吸音材料等を云
う。以下、多孔質フ゛ロックとする)と、又は石炭灰の有効利
用と、経済的に優れた多孔質フ゛ロックの製造方法に関す
る。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coal ash porous block and a method for producing the coal ash porous block, and more particularly to a high utilization rate of coal ash discharged from a coal-fired power plant and a low cost. Porous block (permeable interlocking block, vegetation block, environmental block, retaining wall block, sound absorbing material, etc .; hereinafter referred to as porous block), or the effective use of coal ash And a method for producing a porous block.

【0002】[0002]

【従来の技術】従来、石炭火力発電所から排出される石
炭灰を使ってハ゜ンヘ゜レタイサ゛ーにより造粒して養生すること
により、造粒骨材、コンクリート用骨材、路盤材等に関して研
究を行ない、かつこれら製品の実施化を図りつつある。
その中で、この造粒骨材とセメントヘ゜ーストを使って多孔質フ゛ロ
ック等のコンクリート二次製品をつくることは可能であるが、コス
トがかかるのが問題であった。
2. Description of the Related Art Conventionally, coal ash discharged from a coal-fired power plant has been granulated and cured by a van pelletizer to conduct research on granulated aggregate, concrete aggregate, roadbed material, and the like. We are also working to implement these products.
Among these, it is possible to produce a secondary concrete product such as a porous floc using this granulated aggregate and cement paste, but there has been a problem that the cost is high.

【0003】そして、この種の石炭灰を用いた多孔質フ゛
ロックの製造方法等に関する従来技術としては以下の方法
が提案されている。
The following method has been proposed as a prior art relating to a method for producing a porous block using such coal ash.

【0004】 特開平7-315951号の透水性舗装材の製
造方法(文献(1))は、粒径0.5〜5mmの硬質骨材、石炭
灰、低耐火度窯業原料及び水を高速回転羽根形造粒機に
供給し、当該硬質骨材の外周囲に石炭灰及び低耐火度窯
業原料が緻密に付着した複合造粒物を造粒し、この造粒
された複合造粒物を、複合造粒物間に間隙が残留するよ
うにフ゜レスして舗装材形状の成形体とし、その後、この成
形体を焼成する構成である。この発明は、硬質骨材の周
囲に石炭灰と他の窯業原料を付着させ、それを結合材と
して焼結結合させているので結合強度は得られるが、石
炭灰の利用率が少ないので、膨大な量を排出している石
炭灰の有効利用としては十分でない。また焼結させてい
るために焼成費がかかり経済的でない。
[0004] Japanese Patent Application Laid-Open No. 7-315951 discloses a method for producing a water-permeable pavement material (Reference (1)), which comprises a hard aggregate having a particle size of 0.5 to 5 mm, coal ash, a low refractory ceramic raw material and water with a high-speed rotating blade. The raw material is supplied to a granulator, and a composite granulated product in which coal ash and a low refractory ceramic raw material are densely adhered to the outer periphery of the hard aggregate is granulated, and the granulated composite granulated product is subjected to composite granulation. In this configuration, a pavement-shaped formed body is formed by pressing so as to leave gaps between the granules, and then the formed body is fired. According to the present invention, coal ash and other ceramic raw materials are adhered to the periphery of the hard aggregate, and they are sintered and bonded as a binder, so that the bonding strength can be obtained. It is not enough for the effective use of coal ash that emits a large amount. In addition, since sintering is performed, sintering costs are high and it is not economical.

【0005】 特開平10-298905号の透水性フ゛ロック(文
献(2))は、各種のフライアッシュを混合し、この混合物に水を
添加してヘ゜ースト状にした後、このヘ゜ースト状の混合物に結合
剤としてエホ゜キシ樹脂を添加してかつ均一に分散し、型枠
内に入れ、押圧後開放し、20〜30分後に脱型し、常温で
1日程度放置した構成であり、石炭灰の有効利用と、軽
量かつ安価な透水性フ゛ロックを提供することを意図する。
この発明は、フライアッシュと水カ゛ラスの混合物で造ったフ゛ロック
は、結合強度を得るために、900〜1300℃の焼成を必要
としており、焼成しない場合には結合材にエホ゜キシ等の高
価な樹脂を使用するとしているので、何れの発明も、経
済的でない。
[0005] Japanese Patent Application Laid-Open No. H10-298905 discloses a water-permeable block (Reference (2)) in which various fly ashes are mixed, water is added to the mixture to form a paste, and the paste is combined with the paste-like mixture. Add an epoxy resin as an agent and disperse it uniformly, put it in a mold, open it after pressing, remove it after 20 to 30 minutes,
The structure is left for about one day, and is intended to provide an effective use of coal ash and a lightweight and inexpensive water-permeable block.
According to the present invention, a block made of a mixture of fly ash and water glass needs to be fired at 900 to 1300 ° C. in order to obtain the bonding strength, and if not fired, an expensive resin such as epoxy is used as the binder. Neither invention is economical because it is intended to be used.

【0006】 特開平11-130557号の透水性フ゛ロック及び
その製造方法(文献(3))は、石炭灰に少量の微粉炭を混
入し、水を添加して任意の粒径の生粒状体を作り、連続
焼成炉で焼結させた粒状体をセメントヘ゜ーストと混合し、型枠
に入れ、乾燥後養生して透水性フ゛ロックを製造する構成で
ある。この発明は、石炭灰から造った造粒骨材を原料と
しているので粉砕、整粒する必要がなく、また石炭灰の
使用量が多いので、石炭灰の有効利用の観点からは好ま
しいが骨材製造時に焼成炉で焼結させる必要があるため
に設備が大掛かりになりコストがかかる上に、焼結させた
骨材をセメントヘ゜ーストで結合させているため十分な強度が得
られない課題がある。また強度をあげようとしてセメントヘ゜
ーストの量を多くすると、骨材間の空隙を埋めてしまい透
水性が低下してしまう課題もある。
[0006] Japanese Patent Application Laid-Open No. H11-130557 discloses a water-permeable block and a method for producing the same (Reference (3)). A small amount of pulverized coal is mixed into coal ash, and water is added to produce raw granules having an arbitrary particle size. The granules produced and sintered in a continuous firing furnace are mixed with a cement paste, placed in a mold, dried and cured to produce a water-permeable block. Since the present invention uses granulated aggregate made from coal ash as a raw material, it is not necessary to grind and size the aggregate, and since the amount of coal ash used is large, it is preferable from the viewpoint of effective utilization of coal ash, but the aggregate is preferable. Since it is necessary to perform sintering in a sintering furnace at the time of manufacturing, the equipment becomes large-scale and costly. In addition, there is a problem that sufficient strength cannot be obtained because the sintered aggregate is bonded with a cement paste. In addition, if the amount of cement paste is increased in order to increase the strength, there is a problem that the voids between the aggregates are filled and the water permeability is reduced.

【0007】 特開平11-139886号の粗粒子焼結体及
びその製造方法(文献(4))は、クリカーンアッシュ骨材、ソータ゛石灰
カ゛ラスと水硬性セメントを混合し、造粒物を生成し振動成形機
型枠内に充填し、成形面圧力を利用してフ゛ロック造形物を
成形し、このフ゛ロック造形物を焼成して製造されるフ゛ロック
で、このフ゛ロックの連続気孔の透水性を利用して、水の浄
化を図る構成である。この発明は、燒結(熔融カ゛ラス相で
の結合)であるので、本発明の造粒物の一体化による結
合とは異なること、又はフ゛ロック製造時に焼成炉での燒結
工程を要し、設備の大型化、コストの上昇等の課題があ
る。
[0007] Japanese Patent Application Laid-Open No. 11-139886 discloses a coarse-grained sintered body and a method for producing the same (Reference (4)), in which a granulated material is produced by mixing aggregates of Kurikan ash, a sorter, a lime glass and a hydraulic cement. Filled into a mold of a vibration molding machine, molded into a block using the pressure of the molding surface, and fired from the block to produce a block, utilizing the water permeability of the continuous pores of the block. , To purify water. Since the present invention is sintering (bonding in a molten glass phase), it differs from the bonding by the integration of the granules of the present invention, or requires a sintering step in a firing furnace at the time of producing the block, and the equipment is large-sized. There are problems such as cost reduction and cost increase.

【0008】 尚、振動成形機を利用してセメントヘ゛ースを
締め固める発明としては、特開平9-87053号の即脱ホ゜ーラス
コンクリート成形体及びその製造方法、特開平10-87377号の繊
維補強ホ゜ーラスコンクリート成形体及びその製造方法、又は特開
平11-49556号の2層型高機能透水平板及びその製造方法
等の文献がある。この文献は、締め固めである。従っ
て、本発明の如く、湿潤状態の造粒物間に連続気孔を形
成しながら、造粒物同士を結合する構成でなく、使用の
目的及び作用が異なる。
The invention of compacting cement paste by using a vibration molding machine is disclosed in Japanese Unexamined Patent Publication No. 9-87053, a method for manufacturing a rapidly removable porous concrete and a method for manufacturing the same, and Japanese Unexamined Patent Publication No. 10-87377, a fiber reinforced porous concrete. There are documents such as a molded article and a method for producing the same, or a two-layer high-performance transparent horizontal plate and a method for producing the same described in JP-A-11-49556. This document is a compaction. Therefore, the present invention does not have a configuration in which the granules are connected to each other while forming continuous pores between the granules in the wet state as in the present invention, but has a different purpose and action.

【0009】その他に、石炭灰以外の廃棄物焼却灰を用
いた多孔質フ゛ロックの製造方法としては、陶磁器粉砕物の
骨材周囲に焼却灰を付着させた粒子をフ゜レス成形して焼結
させる方法や、焼却灰をフ゜レス成形して焼成したフ゛ロックを
粉砕して骨材としたのち、無機結合材を加えて再度フ゜レス
成形して焼成する方法等が提案されている。しかし、こ
れらの方法は焼成費がかかるので経済的ではないと判断
できる。
[0009] In addition, as a method for producing a porous block using waste incineration ash other than coal ash, a method in which particles obtained by adhering incineration ash around aggregates of crushed ceramics, are subjected to pressure forming and sintering. Further, a method has been proposed in which a fired ash is press-formed into a fired crushed aggregate to form an aggregate, then an inorganic binder is added thereto, and the ash is fired again and fired. However, it can be judged that these methods are not economical because firing costs are required.

【0010】[0010]

【発明が解決しようとする課題】前記文献(1)〜(4)及び
従来の多孔質フ゛ロックの製造方法は、それぞれの構成と特
徴を備える反面で、前述の如く、改良の余地も残ってい
る。
The above-mentioned references (1) to (4) and the conventional method for manufacturing a porous block have their respective configurations and features, but as described above, there is still room for improvement. .

【0011】上記に鑑み、本発明は、下記のような石炭
灰質多孔質フ゛ロックの製造方法を提供する。
In view of the above, the present invention provides a method for producing a coal ash porous block as described below.

【0012】[0012]

【課題を解決するための手段】請求項1の発明は、石炭
灰を主原料とした石炭灰質多孔質フ゛ロック(以下、多孔質フ
゛ロックとする)を、簡便かつ低コストに製造すること、又は
石炭灰の利用の拡充を図ること、また湿潤状態の造粒物
に弱い塑性流動を起し、当該造粒物同士が均一かつ混合
状態で結合した石炭灰とセメントでなる造粒物塊の部分と、
造粒物塊間に形成した気孔部分とから構成されので、透
水性と強度の優れた多孔質フ゛ロックを提供すること、等を
意図する。
Means for Solving the Problems An object of the present invention is to produce a coal ash porous block using coal ash as a main raw material (hereinafter referred to as a porous block) simply and at low cost, or To expand the use of ash, and to cause a weak plastic flow in the wet granules, the granules formed of coal ash and cement in which the granules are combined in a uniform and mixed state ,
It is intended to provide a porous block excellent in water permeability and strength because it is composed of the pores formed between the granules.

【0013】請求項1は、石炭灰とセメントの均一な混合粉
体原料からなる湿式造粒された造粒物に水を添加して湿
潤状態の造粒物を生成し、この湿潤状態の造粒物に弱い
塑性流動を起し、造粒物同士が略均一状態に結合して生
成される石炭灰とセメントでなる造粒物塊の部分と、造粒物
塊間に形成した気孔部分とから構成される石炭灰質多孔
質フ゛ロックである。
[0013] The first aspect of the present invention is to provide a wet-granulated product by adding water to a wet-granulated product comprising a uniform mixed powder material of coal ash and cement, and producing a wet-granulated product. It causes weak plastic flow in the granules, and the granules formed of coal ash and cement, which are generated by combining the granules in a substantially uniform state, and the pores formed between the granules It is a coal ash porous block composed of

【0014】請求項2の発明は、石炭灰を主原料として
造粒物をそのまま型枠に投入して振動成形する手段を採
用し、石炭灰から多孔質フ゛ロックを、簡便かつ低コストに製造
し、又は石炭灰の利用の拡充を図ること、また湿潤状態
の造粒物に弱い塑性流動を起し、造粒物同士が略均一状
態で結合した石炭灰とセメントでなる造粒物塊の部分を成形
したことで、多孔質フ゛ロックの強度の向上を図ること、等
を意図する。
[0014] The invention of claim 2 employs means for subjecting the granulated material as it is to the form as a main raw material to a vibratory molding by directly introducing the granulated material into a porous block from the coal ash at a simple and low cost. Or to expand the use of coal ash, and the part of the granulated mass consisting of coal ash and cement in which the granulated material in the wet state causes weak plastic flow and the granulated materials are combined in a substantially uniform state It is intended that the strength of the porous block be improved by molding the.

【0015】請求項2は、石炭灰とセメントとの混合粉体原
料に水を添加して造粒物を生成する工程と、この得られ
た造粒物が未硬化状態で、かつ適度の水分を含有する状
態、即ち、湿潤状態を維持した状態で、前記工程より取
出す工程と、この湿潤状態の造粒物を型枠内に投入し、
当該型枠に対する振動付与により、湿潤状態の造粒物に
塑性流動現象を起し、造粒物同士が略均一状態に結合し
て生成される石炭灰とセメントでなる造粒物塊の部分と、造
粒物塊間に形成した気孔部分とを成形してフ゛ロック造形物
を得る工程と、このフ゛ロック造形物を養生する工程と、で
構成される石炭灰質多孔質フ゛ロックの製造方法である。
A second aspect of the present invention is a step of adding water to a mixed powder raw material of coal ash and cement to form a granulated product, and the obtained granulated product is in an uncured state and has a moderate moisture content. In other words, in a state where the wet state is maintained, the step of taking out from the above-described step, and the wet granulated material is put into a mold,
By the vibration imparted to the formwork, a plastic flow phenomenon occurs in the wet granules, and the granules formed of coal ash and cement generated by combining the granules in a substantially uniform state, and A method for producing a coal-ash porous block, comprising: a step of forming a pore formed by agglomeration between agglomerates; and a step of curing the block.

【0016】請求項3の発明は、多孔質フ゛ロックの製造に最
適な造粒物の粒径を提供する。
The third aspect of the present invention provides an optimum granule particle size for producing a porous block.

【0017】請求項3は、造粒物の粒径を、略3〜30mm程
度とした多孔質フ゛ロックの製造方法である。
A third aspect of the present invention is a method for producing a porous block in which the particle size of the granulated material is approximately 3 to 30 mm.

【0018】請求項4の発明は、多孔質フ゛ロックの製造に最
適な石炭灰とセメントの重量比を提供する。
[0018] The invention of claim 4 provides an optimum weight ratio of coal ash to cement for producing porous block.

【0019】請求項4は、石炭灰とセメントの重量比が、略6
0:40〜95:5程度とした多孔質フ゛ロックの製造方法であ
る。
The weight ratio of coal ash to cement is preferably about 6%.
This is a method for producing a porous block having a ratio of about 0:40 to 95: 5.

【0020】請求項5の発明は、多孔質フ゛ロックの強度の向
上が図れる湿潤状態の造粒物を提供する。
[0021] The invention of claim 5 provides a wet granulated material capable of improving the strength of the porous block.

【0021】請求項5は、湿潤状態の造粒物の含水率が
外比で、略20〜40%程度(程度を省略する)とした多孔質
フ゛ロックの製造方法である。
A fifth aspect of the present invention relates to a method for producing a porous block in which the moisture content of the wet granulated material is about 20 to 40% (the degree is omitted) as an external ratio.

【0022】[0022]

【発明の実施の形態】本発明では、石炭火力発電所から
排出される石炭灰とセメントとの混合粉体原料に水を添加し
て造粒する。本発明のセメントとは水硬性石灰、天然セメント、
ホ゜ルトラント゛セメント、アルミナセメント等の水硬性セメント、消石灰、石
膏、マク゛ネシアセメント等の気硬性セメント、ホ゜ソ゛ランセメント、シリカセメン
ト、石灰スラク゛セメント、高炉セメント、フライアッシュセメント等の混合セメント
を含むものである。
BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, water is added to a mixed powder raw material of coal ash and cement discharged from a coal-fired power plant to perform granulation. The cement of the present invention is hydraulic lime, natural cement,
It includes hydraulic cements such as polyester cement, alumina cement, etc., air-hardened cements such as slaked lime, gypsum, and Macnesia cement, and mixed cements such as cement, silica cement, lime slack cement, blast furnace cement, and fly ash cement.

【0023】前記石炭灰とセメントとの最適重量比はセメントの
種類により異なり、ホ゜ルトラント゛セメントの場合は、略60:40〜
90:10の範囲で、好ましくは、略65:35〜85:15の範囲
とする。またホ゜ルトラント゛セメント量が略10%以下であると多孔
質フ゛ロックの強度が十分でなく、また略40%以上では石炭灰
の使用量が少ないので本発明の目的を達成するには、十
分でない。一方、セメントを消石灰とした場合の石炭灰と消
石灰との重量比は略70:30〜95:5で、好ましくは、略7
5:25〜90:10の範囲とする。この場合も消石灰量が5%
以下であると多孔質フ゛ロックの強度が十分でないので好ま
しくない。但し、この範囲以外の混合比であっても、多
孔質フ゛ロック200の製造は可能である。
The optimum weight ratio between the coal ash and the cement differs depending on the type of the cement.
It is in the range of 90:10, preferably in the range of approximately 65:35 to 85:15. In addition, if the amount of the polyester is less than about 10%, the strength of the porous block is not sufficient, and if the amount is more than about 40%, the amount of coal ash used is small, so that the object of the present invention is not sufficient. On the other hand, when the cement is slaked lime, the weight ratio of coal ash to slaked lime is about 70:30 to 95: 5, and preferably about 7:30.
The range is from 5:25 to 90:10. Also in this case, the amount of slaked lime is 5%
If it is less than the above, the strength of the porous block is not sufficient, which is not preferable. However, even if the mixing ratio is outside this range, the porous block 200 can be manufactured.

【0024】この混合粉体原料は水を添加して混練した
のち、造粒機により略3〜30mmの造粒物に造粒する。造
粒物の大きさを規定しているのは3mm以下ではフ゛ロックを形
成したときに、造粒物の変形により連続した空孔が少な
くなり、また30mm以上では造粒物間の結合面積が少なく
なり多孔質フ゛ロックの強度を低下させるので実用的ではな
くなる。この時の造粒方法又は造粒機は、限定されない
が、例えば、ハ゜ンヘ゜レタイサ゛ー等の転動造粒機、又は押出し造
粒機による造粒方法等がある。いずれにしても、粒径範
囲の造粒物に造粒でき、かつ同じような粒径にそろえる
ことができる造粒方法、又は造粒機は、多孔質フ゛ロック200
としたときに、連続気孔2を形成しやすくなるので好ま
しいことが実証された。
The mixed powder raw material is kneaded by adding water, and then granulated into a granulated product of approximately 3 to 30 mm by a granulator. The size of the granulated material is specified when the block size is 3 mm or less, when pores are formed, the number of continuous pores decreases due to deformation of the granulated material, and when the block size is 30 mm or more, the bonding area between granulated materials is small. This reduces the strength of the porous block and is not practical. The granulation method or granulator at this time is not limited, and examples thereof include a rolling granulator such as a vane pelletizer or a granulation method using an extrusion granulator. In any case, a granulation method or a granulator capable of granulating into granules having a particle size range and having the same particle size can be obtained by using a porous block 200.
In this case, it was proved that it was preferable because the continuous pores 2 were easily formed.

【0025】このようにして造粒した造粒物が、セメントに
より硬化する前の造粒後の湿潤状態(湿潤状態)の造粒物
1を直接型枠内に入れて振動成形するところに本発明の
特徴がある。即ち、造粒した直後の湿潤状態の造粒物1
が適度な含水率であると(図1)、振動をかけることに
より、湿潤状態の造粒物1に弱い塑性流動を発生し、湿
潤状態の造粒物1間の連続気孔2(空隙)を確保しなが
ら、当該造粒物同士が付着しやすい状況となる(図
2)。従って、適度な含水率を持った造粒物を型枠に入
れて振動をかけることにより湿潤状態の造粒物1同士が
結合し、連続気孔2を有する型枠形状の多孔質フ゛ロック200
を形成することができる。尚、湿潤状態の造粒物(図示
せず、以下01として区分する)の含水率が少ない場合に
は、本発明と同じように振動をかけても弱い塑性流動の
発生がなく、湿潤状態の造粒物(01)同士が付着し難
い。この結果、本発明が意図する多孔質フ゛ロック200は成形
できない。換言すると、この多孔質フ゛ロック(図示せず、
以下001として区分する)は強度の弱い欠点が考えられ
る。また逆に湿潤状態の造粒物(01)の含水率が多すぎ
ると型枠に入れる前にくっついたり、振動成形した時に
湿潤状態の粒形状(01)が崩れて一体化し、連続気孔2
を形成しなくなったりする。この結果、本発明が意図す
る多孔質フ゛ロック200は成形できない。本発明者の経験で
は、この多孔質フ゛ロック200の成形に適した造粒物の最適含
水量は原料の成分や粒度の違いにより多少異なるが、前
記の如く、振動をかけることにより弱い塑性流動を起
し、造粒形状をそれほど崩さず湿潤状態の造粒物1同士
が結合する状況が最適である。そして、石炭灰の品質の
ハ゛ラツキを考慮した場合、湿潤状態の造粒物1の含水率が略
20〜40%の範囲内であれば前記方法により多孔質フ゛ロック2
00を形成することができる。また造粒した湿潤状態の造
粒物1の含水率が少ない時は型枠に入れる前に、この湿
潤状態の造粒物1表面を適度な状態に湿らせても良い。
この例における振動成形された型枠内の造粒物は、当初
の造粒形態が崩れて、面状態(融合状態で)で結合部が一
体化して、連繋強度が確保された構造の造粒物塊であっ
て、同一材料(同一材質)による結合一体化が図れる。
The granulated material thus granulated is a granulated material in a wet state (wet state) after granulation before hardening by cement.
The feature of the present invention resides in that the vibration mold 1 is directly placed in a mold for vibration molding. That is, the wet granulated material 1 immediately after granulation 1
If the water content is moderate (FIG. 1), a weak plastic flow is generated in the wet granules 1 by applying vibration, and continuous pores 2 (voids) between the wet granules 1 are formed. While securing, the granules are likely to adhere to each other (Fig.
2). Therefore, the granulated material 1 having an appropriate moisture content is put into a mold and vibrated, whereby the wet granulated materials 1 are bonded to each other, and the mold-shaped porous block 200 having continuous pores 2 is formed.
Can be formed. When the moisture content of the wet granules (not shown, hereinafter referred to as 01) is small, even if vibration is applied as in the present invention, there is no generation of weak plastic flow, and Granules (01) hardly adhere to each other. As a result, the porous block 200 intended by the present invention cannot be formed. In other words, this porous block (not shown,
(Hereinafter, it is classified as 001) may have a weak point of weakness. On the other hand, if the moisture content of the wet granules (01) is too high, the granules (01) stick together before being placed in the mold, or the granules (01) in the wet state collapse and become integrated when subjected to vibration molding, and the continuous pores 2
Or stop forming. As a result, the porous block 200 intended by the present invention cannot be formed. According to the experience of the present inventor, the optimum water content of the granulated material suitable for molding the porous block 200 is slightly different depending on the components and the particle size of the raw materials, but as described above, the weak plastic flow is obtained by applying vibration. It is optimal that the granules 1 in the wet state are caused to be combined with each other without causing the granulation shape to be disturbed so much. In consideration of the variation in the quality of coal ash, the moisture content of the granulated material 1 in a wet state is substantially
If it is within the range of 20 to 40%, the porous block 2 is obtained by the above method.
00 can be formed. When the water content of the granulated wet granules 1 is low, the surface of the wet granules 1 may be moistened to an appropriate state before being placed in a mold.
In this example, the granulated material in the vibration-molded mold has a granulated structure in which the original granulated form is collapsed, the joints are integrated in a planar state (in a fused state), and the connection strength is secured. It is an object lump and can be combined and integrated by the same material (the same material).

【0026】尚、本発明は、従来の振動成形を利用し
て、造粒物に接着材料をまぶし、この接着材料を媒介と
して造粒物の結合部を一体化する構成とは異なる。
Note that the present invention is different from a configuration in which an adhesive material is applied to a granulated material using conventional vibration molding, and a bonding portion of the granulated material is integrated using the adhesive material as a medium.

【0027】前述の成形後の多孔質フ゛ロック200は、型枠か
ら脱型後、気中又は蒸気養生することで硬化する。この
養生硬化後の多孔質フ゛ロック200は、湿潤状態の造粒物1が
そのまま結合して一体化しているので、湿潤状態の造粒
物1間の結合力が強く、実用的な強度が得られることが
実証されている。
The molded porous block 200 is cured by being cured in the air or by steam after being released from the mold. The porous block 200 after curing and curing has the wet granules 1 bonded and integrated as they are, so that the bonding force between the wet granules 1 is strong and practical strength is obtained. Has been demonstrated.

【0028】また本発明の特徴は、湿潤状態の造粒物に
弱い塑性流動を起し、造粒物同士が均一かつ混合状態で
結合した石炭灰とセメントでなる造粒物塊20の部分と、造粒
物塊間に連続気孔を形成した気孔部分2とから構成され
た多孔質フ゛ロック200である。
A feature of the present invention is that a weak plastic flow occurs in the wet granulated material, and the granulated material mass 20 composed of coal ash and cement in which the granulated materials are combined in a uniform and mixed state. The porous block 200 is composed of a pore portion 2 in which continuous pores are formed between the granules.

【0029】[0029]

【実施例】以下、本発明の一例を図面に基づいて説明す
る。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

【0030】[実施例1]火力発電所から排出された表1
に示す配合A、Bの2種類の石炭灰80%とホ゜ルトラント゛セメント20
%の配合に対して水を外比で20%添加して混練機で混練
後、ハ゜ンヘ゜レタイサ゛ーで散水しながらφ13〜17mmの球状に造
粒し、このとき造粒後の含水率が22%、24%、26%、28
%、30%、32%となるように散水量を調整して造粒し
た。造粒したそれぞれのヘ゜レットを、すぐに200×100mmの
型枠に投入して振動フ゜レスにより成形し、成形後、脱型し
て蒸気養生を行った。成形性、及び養生後の多孔質フ゛ロッ
クの透水係数と曲げ強度の結果を表2に示す。尚、多孔質
フ゛ロックの品質評価で透水係数を求めたのは、透水係数が
連続気孔の形成状況の目安となるためであり、透水係数
が大きい程、連続気孔を多く形成しているといえる。ま
た、参考値としてインターロッキンク゛フ゛ロック協会の透水性インターロッキ
ンク゛フ゛ロックの品質規格値を示す。
[Example 1] Table 1 discharged from a thermal power plant
80% of the two types of coal ash of formulation A and B and 20 of cement
% Of water with an external ratio of 20% based on the mixing ratio, kneaded with a kneading machine, and granulated into a spherical shape of φ13 to 17 mm while sprinkling water with a vane pelletizer. At this time, the moisture content after granulation was 22%. 24%, 26%, 28
%, 30%, and 32%, and the amount of water was adjusted so that granulation was performed. Each of the granulated pellets was immediately put into a 200 × 100 mm formwork, molded by a vibration press, and after molding, demolded and steam cured. Table 2 shows the results of the moldability, the water permeability and the bending strength of the porous block after curing. The reason for determining the water permeability in the quality evaluation of the porous block is that the water permeability is a measure of the state of formation of continuous pores, and it can be said that the larger the water permeability, the more continuous pores are formed. As reference values, the quality standard values of the water-permeable interlocking block by the Association of Interlocking Blocks are shown.

【0031】 (※1成形性で×は成形不可、○は成形可能)[0031] (* 1 is not moldable, ○ is moldable)

【0032】実施例1の結果より、フ゛ロック形状に成形でき
て、且つ透水性インターロッキンク゛フ゛ロックの品質規格を満足して
いるのは石炭灰Aの場合は造粒物の含水率が20〜24%の
範囲内であり、石炭灰Bの場合は造粒物の含水率が26〜3
0%の範囲内である。
From the results of Example 1, it is found that the coal ash A, which can be formed into a block shape and satisfies the quality standard of the water-permeable interlocking block, has a water content of 20 to 24% of the granulated material. In the case of coal ash B, the moisture content of the granulated material is 26 to 3
It is within the range of 0%.

【0033】[実施例2]火力発電所から排出された表1
に示す品質の石炭灰80%とホ゜ルトラント゛セメント20%の配合に対
して水を外比で20%添加して混練機で混練後、ハ゜ンヘ゜レタイ
サ゛ーにより含水率が28%となるように散水しながら造粒
し、3〜7mm、13〜17mm、25〜30mmの形状に造粒した。造
粒したヘ゜レットをすぐに200×100mmの金型に投入して振動フ
゜レスにより成形後、脱型して蒸気養生を行った。養生後
の多孔質フ゛ロックの品質を表3に示す。
[Example 2] Table 1 discharged from a thermal power plant
Water is added at an external ratio of 20% to the blend of coal ash 80% and polyester cement 20% of the quality shown in the table below, and the mixture is kneaded with a kneading machine. The mixture is then sprinkled with a vane sizing machine so that the water content becomes 28%. It was granulated and granulated into shapes of 3 to 7 mm, 13 to 17 mm, and 25 to 30 mm. The granulated pellets were immediately put into a 200 × 100 mm mold, molded by a vibration press, then removed from the mold and subjected to steam curing. Table 3 shows the quality of the porous block after curing.

【0034】実施例2の結果より、造粒物が大きくなる
ほど透水性は高く、強度は低いといえる。
From the results of Example 2, it can be said that the larger the granulated material, the higher the water permeability and the lower the strength.

【0035】[実施例3]火力発電所から排出された表1
に示す品質の石炭灰90%と消石灰10%の配合に対して水
を外比で25%添加して混練機で混練後、ハ゜ンヘ゜レタイサ゛ーに
より含水率が28%となるように散水しながら造粒しφ3
〜7mmの球状に造粒した。造粒したヘ゜レットを200×100mmの
型枠に投入して振動フ゜レスにより成形後、脱型して蒸気養
生を行った。養生後の多孔質フ゛ロックの品質を表4に示す。
[Example 3] Table 1 discharged from a thermal power plant
After adding 25% of water to the blend of 90% coal ash and 10% slaked lime of the quality shown in the table above, mix the mixture using a kneading machine, and granulate while sprinkling water with a vane sizing machine to a water content of 28% Φ3
Granulated into 77 mm spheres. The granulated pellets were put into a 200 × 100 mm formwork, formed by a vibration press, then removed from the mold and subjected to steam curing. Table 4 shows the quality of the porous block after curing.

【0036】実施例3ではセメントを消石灰とした場合で
も、得られた多孔質フ゛ロックは透水性インターロッキンク゛フ゛ロックの品
質規格を満足している。
In Example 3, even when the cement is slaked lime, the obtained porous block satisfies the quality standard of the water-permeable interlocking block.

【0037】[実施例4]火力発電所から排出された表1に
示す品質の石炭灰80%とホ゜ルトラント゛セメント20%の配合に対し
て水を外割で25%添加して混練機で混練後、押し出し成
形機によりφ5×5mmとφ10×10mmのヘ゜レットを成形した。
造粒したヘ゜レットを200×10mmの型枠に投入して振動フ゜レスに
より成形後、脱型して蒸気養生を行った。養生後の多孔
質フ゛ロックの品質を表5に示す。
[Example 4] Water was added to a blend of 80% coal ash and 20% polyester cement of the quality shown in Table 1 discharged from a thermal power plant, and 25% of water was added on an external basis. A pellet of φ5 × 5 mm and φ10 × 10 mm was formed by an extrusion molding machine.
The granulated pellets were put into a 200 × 10 mm formwork, formed by a vibration press, then removed from the mold and subjected to steam curing. Table 5 shows the quality of the porous block after curing.

【0038】押し出し成形により得られたヘ゜レットを使っ
てもハ゜ンヘ゜レタイサ゛ーによる造粒物の場合と同様に多孔質フ゛ロ
ックの製造は可能である。
The use of a pellet obtained by extrusion molding enables the production of a porous block in the same manner as in the case of a granulated product by a vane pelletizer.

【0039】[実施例5]火力発電所から排出された表1に
示す品質の石炭灰とホ゜ルトラント゛セメント20%の配合に対して水
を外割で20%添加して混練機で混練後、ハ゜ンヘ゜レタイサ゛ーに
より含水率が28%となるように散水しながら造粒し、φ
13〜17mmの形状に造粒した。造粒したヘ゜レットをすぐに振
動フ゜レス成形して、1000×1000×280mmの環境緑化フ゛ロック形
状を成形し、脱型して蒸気養生を行った。養生後のフ゛ロッ
クの品質を表6に示す。
Example 5 20% of water was added to a mixture of coal ash of the quality shown in Table 1 and 20% of a polyester cement discharged from a thermal power plant, kneaded with a kneading machine, and then crushed. Granulate while spraying water with a pelletizer so that the water content becomes 28%.
Granulated to 13-17 mm shape. The granulated pellets were immediately subjected to vibration press molding to form an environmental greening block shape of 1000 × 1000 × 280 mm, which was removed from the mold and subjected to steam curing. Table 6 shows the quality of the block after curing.

【0040】環境緑化用の大型フ゛ロック(環境フ゛ロックの一種)
についても連続気孔を有した多孔質フ゛ロックを製造するこ
とができる。
Large block for environmental greening (a kind of environmental block)
As for the above, a porous block having continuous pores can be manufactured.

【0041】[0041]

【発明の効果】請求項1の発明は、石炭灰とセメントの均一
な混合粉体原料からなる湿式造粒された造粒物に水を添
加して湿潤状態の造粒物を生成し、湿潤状態の造粒物に
弱い塑性流動を起し、造粒物同士が略均一状態に結合し
て生成される石炭灰とセメントでなる造粒物塊の部分と、造
粒物塊間に形成した気孔部分とから構成されることを特
徴とする石炭灰質多孔質フ゛ロックである。従って、湿潤状
態の造粒物に弱い塑性流動を起し、造粒物同士が均一か
つ混合状態で結合した石炭灰とセメントでなる造粒物塊の部
分と、造粒物塊間に形成した気孔部分とから構成される
ので、透水性と強度の優れた多孔質フ゛ロックを提供でき
る。
According to the first aspect of the present invention, water is added to a wet-granulated granulated material comprising a uniform powder mixture of coal ash and cement to produce a wet granulated material, A weak plastic flow is caused in the granulated material in the state, and the granulated material is formed between the granulated material mass and the portion of the granulated material mass formed of coal ash and cement generated by combining the granulated materials in a substantially uniform state. A coal ash porous block characterized by comprising a pore portion. Therefore, a weak plastic flow is caused in the wet granules, and the granules are formed between the granules formed of the coal ash and the cement in which the granules are combined uniformly and in a mixed state, and between the granules. Since it is composed of a pore portion, a porous block having excellent water permeability and strength can be provided.

【0042】請求項2の発明は、石炭灰とセメントとの混合
粉体原料に水を添加して造粒物を生成する工程と、造粒
物が未硬化状態で、かつ適度の水分を含有する状態、即
ち、湿潤状態を維持した状態で、前記工程より取出す工
程と、湿潤状態の造粒物を型枠内に投入し、型枠に対す
る振動付与により、湿潤状態の造粒物に弱い塑性流動を
起し、造粒物同士が略均一状態で結合した石炭灰とセメント
でなる造粒物塊の部分と、造粒物塊間に形成した気孔部
分とを成形してフ゛ロック造形物を得る工程と、フ゛ロック造形物
を養生する工程とで構成される。従って、湿潤状態の造
粒物に弱い塑性流動を起し、造粒物同士が略均一状態で
結合した石炭灰とセメントでなる造粒物塊の部分を成形した
ことにより、この多孔質フ゛ロックの強度の向上が図れる。
[0042] The invention of claim 2 is characterized in that a step of adding water to a mixed powder raw material of coal ash and cement to form a granulated material, and that the granulated material is in an uncured state and contains a moderate amount of water. In other words, in the state where the wet state is maintained, the step of taking out from the above-mentioned step and the step of taking out the wet state granules into the mold, and applying vibration to the form, weak plasticity to the wet state granules. Flow is caused to form a granulated mass part consisting of coal ash and cement in which the granulated materials are combined in a substantially uniform state, and a pore part formed between the granulated masses to obtain a block molded product. It consists of a process and a process of curing the block molded object. Therefore, a weak plastic flow is caused in the wet granules, and the granules formed of coal ash and cement in which the granules are combined in a substantially uniform state are formed. Strength can be improved.

【0043】請求項3の発明は、造粒物の粒径を、略3〜
30mm程度とした構成である。従って、本発明は、多孔質
フ゛ロックの製造に最適な造粒物を提供できる。
According to the third aspect of the present invention, the particle size of the granulated product is approximately 3 to
The configuration is about 30 mm. Therefore, the present invention can provide a granulated product most suitable for producing a porous block.

【0044】請求項4の発明は、石炭灰とセメントの重量比
が、略60:40〜95:5程度とした構成である。従って、
多孔質フ゛ロックの製造に最適な石炭灰とセメントの重量比を提
供できる。
According to a fourth aspect of the present invention, the weight ratio of coal ash to cement is about 60:40 to 95: 5. Therefore,
It can provide the optimum weight ratio of coal ash to cement for the production of porous block.

【0045】請求項5の発明は、湿潤状態の造粒物の含
水率が外比で、略20〜40%程度とした構成である。従っ
て、本発明は、多孔質フ゛ロックの製造に最適な含水率の条
件を提供できる。
The invention according to claim 5 is configured such that the moisture content of the wet granulated material is about 20 to 40% in external ratio. Therefore, the present invention can provide the condition of the water content optimum for the production of the porous block.

【図面の簡単な説明】[Brief description of the drawings]

【図1】造粒後の湿潤状態の造粒物を示した模式図であ
る。
FIG. 1 is a schematic diagram showing a granulated product in a wet state after granulation.

【図2】複数の接触する湿潤状態の造粒物に振動を付与
した状態の模式図である。
FIG. 2 is a schematic diagram of a state in which vibration is applied to a plurality of wet granules in contact with each other.

【図3】本発明の多孔質フ゛ロックの断面を写真で示した図で
ある。
FIG. 3 is a photograph showing a cross section of the porous block of the present invention.

【図4】本発明の製造方法の流れを概述するフローチャート図で
ある。
FIG. 4 is a flowchart outlining the flow of the manufacturing method of the present invention.

【符号の説明】[Explanation of symbols]

1 湿潤状態の造粒物 2 連続気孔 20 造粒物塊 200 多孔質フ゛ロック 1 Wet granulation 2 Continuous pores 20 Granulation mass 200 Porous block

───────────────────────────────────────────────────── フロントページの続き (72)発明者 安藤 兼治 名古屋市緑区大高町字北関山20番地の1 中部電力株式会社電力技術研究所内 (72)発明者 蘇 芳充 愛知県半田市亀崎北浦町1丁目46番地 美 濃窯業株式会社技術研究所内 (72)発明者 尾関 文仁 愛知県半田市亀崎北浦町1丁目46番地 美 濃窯業株式会社技術研究所内 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Kenji Ando 1 at Kita-Kanzan, Chuo Electric Power Co., Inc. 1-46, Minami-cho, Mino Ceramics Co., Ltd.

Claims (5)

【特許請求の範囲】[Claims] 【請求項1】 石炭灰とセメントの均一な混合粉体原料から
なる湿式造粒された造粒物に水を添加して湿潤状態の造
粒物を生成し、この湿潤状態の造粒物に弱い塑性流動を
起し、当該造粒物同士が略均一状態に結合して生成され
る石炭灰とセメントでなる造粒物塊の部分と、造粒物塊間に
形成した気孔部分とから構成されることを特徴とする石
炭灰質多孔質フ゛ロック。
1. A wet-granulated granule made of a uniform granulated powder material of coal ash and cement is added with water to produce a wet-granulated product. It is composed of a portion of granulated mass consisting of coal ash and cement, which is generated by combining the granules in a substantially uniform state, causing weak plastic flow, and a pore portion formed between the granulated masses Coal ash porous block characterized by being performed.
【請求項2】 石炭灰とセメントとの混合粉体原料に水を添
加して造粒物を生成する工程と、 この得られた造粒物が未硬化状態で、かつ適度の水分を
含有する状態、即ち、湿潤状態を維持した状態で、前記
工程より取出す工程と、 この湿潤状態の造粒物を型枠内に投入し、当該型枠に対
する振動付与により、湿潤状態の造粒物に塑性流動現象
を起し、造粒物同士が略均一状態に結合して生成される
石炭灰とセメントでなる造粒物塊の部分と、造粒物塊間に形
成した気孔部分とを成形してフ゛ロック造形物を得る工程
と、 このフ゛ロック造形物を養生する工程と、 で形成される石炭灰質多孔質フ゛ロックの製造方法。
2. A step of adding water to a mixed powder raw material of coal ash and cement to form a granulated product, and the obtained granulated product is in an uncured state and contains a suitable amount of moisture. State, that is, a step of taking out from the above-mentioned step in a state where the wet state is maintained, and charging the wet-state granules into a mold and applying vibration to the form to plastically deform the wet-state granules. Due to the flow phenomenon, the granulated materials are combined into a substantially uniform state, and the granulated mass formed of coal ash and cement and the pores formed between the granulated masses are formed. A step of obtaining a block-shaped object; and a step of curing the block-shaped object.
【請求項3】 上記の造粒物の粒径を、略3〜30mm程度
とした請求項2に記載の石炭灰質多孔質フ゛ロックの製造方
法。
3. The method for producing a coal ash porous block according to claim 2, wherein the particle size of the granulated material is approximately 3 to 30 mm.
【請求項4】 上記の石炭灰とセメントの重量比が、略60:
40〜95:5程度とした請求項2に記載の石炭灰質多孔質フ゛
ロックの製造方法。
4. The weight ratio of coal ash to cement is approximately 60:
3. The method for producing a coal ash porous block according to claim 2, wherein the ratio is about 40 to 95: 5.
【請求項5】 上記の湿潤状態の造粒物の含水率が外比
で、略20〜40%程度とした請求項2に記載の石炭灰質多
孔質フ゛ロックの製造方法。
5. The method for producing a coal ash porous block according to claim 2, wherein the moisture content of the wet granulated product is about 20 to 40% in external ratio.
JP2000334443A 2000-11-01 2000-11-01 Coal-ash-containing porous block and its production process Pending JP2002145678A (en)

Priority Applications (1)

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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2000334443A JP2002145678A (en) 2000-11-01 2000-11-01 Coal-ash-containing porous block and its production process

Publications (1)

Publication Number Publication Date
JP2002145678A true JP2002145678A (en) 2002-05-22

Family

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Family Applications (1)

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Country Status (1)

Country Link
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010007400A1 (en) * 2008-06-23 2010-01-21 University Court Of The University Of Aberdeen A concrete mixture and method of forming the same
JP2011157253A (en) * 2010-02-04 2011-08-18 Nippon Paper Industries Co Ltd Method for producing recycled aggregate from burned ash including scrap tire ash, and recycled aggregate produced thereby

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010007400A1 (en) * 2008-06-23 2010-01-21 University Court Of The University Of Aberdeen A concrete mixture and method of forming the same
US8979997B2 (en) 2008-06-23 2015-03-17 University Court Of The University Of Aberdeen Concrete mixture and method of forming the same
JP2011157253A (en) * 2010-02-04 2011-08-18 Nippon Paper Industries Co Ltd Method for producing recycled aggregate from burned ash including scrap tire ash, and recycled aggregate produced thereby

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